Flight disruption in Spain due to volcanic ash

I have had clients cancel their holiday due to flight disruption caused by the volcanic ash. New clients are due to arrive on Monday and they are now asking where they stand with refunds for their accomodation. Easyjet are offering flight refunds, Monarch have offered free flights on different days but if you have booked accomodation not as a package holiday, ie, done it yourself, then you look unlikely to be covered by holiday insurance for lost accomodation.
I know people have been stranded in apartments, owners and rental agencies in Spian unable to let people stay longer as new people are due to arrive. When possible owners are trying to find the holiday makers new accomodation, but the expense will have to be covered by these people. Some people here in Spain have been stranded since Thursday. The cost must be huge and although there is talk that on Monday flights from Spain to the UK may become available, this is by no means a certainty.
Some people have said that this volcanic activity is an act of God, personally I think it is more the work of the devil.....